You should also encrypt your drive, so that scanning the blocks looks
like random noise.
look for cgd and cgdconfig in google or the man pages on how to set this up.
I'm not sure whether the boot-loader supports cgd, but once the os is
up, the whole drive can be used via it.


thilo

Douglas A. Tutty wrote:
> On Sat, Oct 20, 2007 at 12:34:33PM +0200, Zbigniew Baniewski wrote:
>   
>> I'm wondering, what could be the simplest way to "hide" the existing
>> installation of NetBSD? I mean:
>>
>> - to make it non-bootable
>> - to remove any signs, that it has been installed there (no boot messages at
>>   all, as it were quite "clean" HDD)
>> - ...and to keep the possibility to bring it back entirely, using Live-CD
>>
>> I suppose, it'll some MBR and/or boot-sector manipulation, but not sure
>> exactly, what has to be done. Perhaps someone has a hint?
>>     
>
> Assuming that you're talking about i386, the whole MBR and partition
> table, I think, is contained in the first 64 sectors.  So, use dd to
> pull the first 64 sectors into a file then use dd to put random data
> onto the first 64 sectors.  To reverse, use dd to put your saved file
> back.
>
> Doug.
>
>